A cobporation



Oct. 30, 1923.

' l. SNQW WARP STOP MOTION FOR LOOMS 2 Sheets-Sheet 1 Filed Aug. 27, 1919 Oct. 30, 1923. 1 472500 I. SNOW v WARP STOP MOTION FOR LOOMS Filed Aug. 2'7, 1919 2 Sheets-Sheet 2 J0 LL Patented Gcta 3B, 1923.

UNIT-ED srarss earner bas cs.

, ISAAC snow, osnnwanncn, MASSACHUSETTS, essrenon ro nornnnrtn MANUFAC- TUBING COMPANY, or MILronn, Massnonusnr'rs, a conronerion or MASSA- onosnr'rs.

was? siror MOTION non LOOMS.

Application filed August 27, 1919. Serial No. 326,147.

'To all whom it may concern:

Be'it known that I ISAAC Snow, a citizen of the United States, residing at Lawrence, inthe' county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Warp Stop Motions for Looms; and I do hereby declare the following to be a full, clear, and'exact'descrip- 'tion of the invention, such as will enable others skilled in the art to which it appertains to makeand use the same.

This invention relates to an improvement in warp stop motions for looms. The object of the invention is to provide a warp stop motion for looms of novel construction and arrangement and whose operation is certain eflicient and economical.

With this object in view, the invention consists in the warp stop motion hereinafter described and particularly defined in the claims' In the drawings Figure 1 is an end elevation of a 100m provided with the warp stop motion embodying the present invention; Fig. 2 a section on line 2-2, Fig. 1 of one side of the frame; Fig. 3, a detail showing in elevation the actuating mechanism for moving the detecting mechanism, Flg. 1. Fig. 4 a plan of a portion of a warp stop motion; and Figs. 5 and 6, details to be referred to.

In general this stop motion comprises a plurality of disks of sheet metal or other suitable material between which the warps extend from the whip roll to the shed. These disks are moved during the opera-- tion of the machine and so long as the warps are intact the motion 'ofthe disks does not operate to move the warps substantially out of their plane, but when a warp breaks, the friction between the broken warp and the disks is suflicient to move the warp out of its plane and this motion of the warp is availed of to cause loom stoppage by'engagement of the warp with a detector wire, the latter thereby moving: a member into engagement with the bunter on the lay so that the power derived from the lay is availed of to knock off the loom.

The illustrated embodiment of the invention is described as follows:' The 'warp passes in the usual manner from'th'e warp beam over the whip 'roll 10, through the detecting mechanism 12', through the hedthe cam 34.

dles13, thence to the breast beam 14. 'The lay 15 is supported on swords 1-6 which are actuated by the lay shaft 17. A shipper lever 18 controlsthe operation of the loom, being supported in the frame 19 of the loom.

The warp stop motion comprises a detecting mechanism arranged so that when thread breakage occurs the shipper lever is operated to stop the loom. The detecting faces of'the disks 20. Detector wires 25, 26

are each loosely and separately mounted upon the ends of the shaft 21 outside of the loom frame 19 and are adapted to rest upon the warp threads. The shaft 21 is positioned with relation to the whip roll 10 and breast beam 14 so that the warp threads passfrom the whip roll underneath the shaft 21 and between the lower portions of the surfaces of adjacent disks 20, passing over lease rods 27, 28.

The shaft 21 is oscillated back and forth through a wide angle by a pinion 3O mounted thereon which engages a rack 31 formed upon a rack bar 32, whose upper end is slidably supported in a bearing 33 secured to the loom frame 19; The rack 31 is actuated from the crankshaft 17 by means of a cam 34 secured upon the lay shaft 1'? and a roller secured on the rack bar 32. The iower end of the rack bar 32 constitutes a yoke 36 embracing the lay shaft 1? and serv ing as a guide for the. rack bar as it is moved up anddown by the revolutions of A spring 39 serves to return the rack bar 32 after it has been moved in one direction by the cam 34 and the cooperation cf the spring 39 and cam" 34 with the rack 31 causes the shaft 21 and disks 20 mounted thereon to oscillate back and forth with each'revolutio'n of the crank shaft 17.

During the normal operation of theloom and as long as the warp threads remain intact, the latter are drawn through. the K spaces between adjacent disks against the frictional resistance thereof, caused by the pressure between adjacentsurfaces transmitted to each from the coil springs 23. The tension in the coil springs 23 is regulated so as to be insufficient to cause any substantial lateral deflection or movement of-intact warps or objectionable-wear of the warps but at the same time is sufficient in case of the breaking of a warp to lift the broken warp and thereby move it laterally by the friction of the disks thereagainstzand to pull'itiagainst one of the detector wires 25. or 26 withsuflicient force to lift it and thereby cause loom stoppage.

The pressure maintained between the disks is such that when an individual war-p thread breaks, the portion thereof remaining'between the adjacent disks is firmly gripped by the surfaces thereof'and carried with the disks on their next oscillation outof the normal plane of the other \warp threads and into positions illustrated in Figs. 5-and 6 respectively, thereby raising either one of the detector-wires 25, 26 according to whether the warp thread is broken in front of or to the rear of the disks 20. Thus Fig. 5 illustrates the position of the broken warp thread when the break therein occurs-between the disks and the breast beam, whereas Fig. '6 illustrates the position of the broken warp thread when the break occurs between the whip roll and the disks 2-0. Referring particularly to Figs. 5 and 6, it will be observed that in each a detector wire is raised from its normal to indicating position by a broken warp.

The movement of-either of the detectors 25, 26, by the broken warp thread is utilized to operate the loom stopping devices and for this purpose each of the detectors25y2fi are connected by means of links 37, 38 to one end of levers 4O. 41. The levers 4:0; 41 are pivoted near their centers upon a pintle 43 secured in cars 44:, on the knock-off slide which is siidably mounted on the loom frame 19 by means of bearing cleats 46. The front ends of the levers 40, 41 cooperate with a bunter 47- secured upon the sword of the lay'and are arranged robe held normally in such position that the hunter" 47 is permitted. .to slide .under the front ends thereof during .the oscillations of the lay back and forth. Whe -neither one of the -'detectors'25, 26 is'ra-ised in the manner illustrated in Figs.- 5-a-nd6. 'it will lift the rear ,end of one of the levers 40, il thereby swinging the front .end of one-of'thelevers downwardly into a position in which it will be struck by the hunter 47 as the lay beats :backfthelevers 4-0, 41 andslide 45' being thereby moved as a unit rearwardly with the lay. The front end ofxtheslide45 is ..connected ate: the lower-z end of. a lever :50

epivotedaatifil-ronxthe loonnframezhavingiits upper end resting against the shipper lever when the latter is in its operative position. Thus .as the slide 4:5 is .moved rearwardly the upper end of the lever 50 is swung forwardly, thereby operating toknock off the shipper lever and stop the loom. A spring 52 having one end attached to'the slide l5 and the'other end attached'to one of the cleats 46 operates to move the slide and -.which has provision whereby broken warp threads are automatically moved by the detecting mechanism sons to thereby cause loom stoppage. Inanother-aspect the invention contemplates a warp'stop motion comprising friction devices for engaging the warps which act when a warp breaks to move the broken warp to cause loom stop.- page.

'-While the preferred embodiment ofthe invention has been illustrated and described, it is to be understood that the same may be embodied inother forms within the scope of the following-claims I 1. A war-p stop motion for looms having, in combination, detecting devices through which the warp threads normally pass, means for moving the detecting devices dur lit) ing the normal operation of .theloom, the

broken warp thread to lift it out ofit-s normal position during the movement; of the detecting devicesan d-means actuated by the movement" of the'broken warp thread for causing loom stoppage, saidmeansancluding :memb'ers extended transversely of and resting upon the warp threads, and connectlons between said members and the loom stopping devices.

A warp stop motion for iloomshavmg. in combination, detecting 'devicesthrough which the "warp ;;threads :normally vpa-ss,

means :for oscillating the detecting devices "during the normaloperation ofthe 1oom,:-the detecting devices having provision; fDEL-fifi' gaging the :broken warp thread to-.1iftit;ont of zitsnormalzposition asthedeyicesarsescillated, and means actuated by movement of the warp thread for causing loom stoppage.

4. A warp stop motion for looms having, in combination, a series of disks arranged so that the individual warp threads pass between the surfaces of adjacent disks, said disks being arranged to permit the warp threads to be drawn therebetween during the normal operation of the loom, and having provision whereby the portion of a broken warp thread extended therebetween is gripped by and moved with the disks, means for moving said disks, and means actuated by the movement of said broken warp thread to cause loom stoppage.

5. A warp stop motion for looms having,

in combination, a series of disks arranged so that the individual warp threads pass between surfaces of adjacent disks, said disks being arranged to permit the warp threads to be drawn therebetween during the normal operation of the loom and having provision whereby the portion of the broken warp thread extended therebetween is gripped by and moved with the disks, connections between the disks and the lay shaft of the loom for moving the disks, and means actuated by the movement of said broken warp thread to cause loom stoppage.

6. A warp stop motion for looms having, in combination, a series of disks arranged so that the individual warp threads pass between surfaces of adjacent disks, said disks being arranged to permit the warp threads to be drawn therebetween during the normal operation of the loom and having provision whereby the portion of the broken warp thread extended therebetween is gripped and moved with the disks, means for moving said disks, and means actuated by the movement of said broken warp thread to cause loom stoppage including a detector extended transversely of the warp threads adjacent said disks, connections between said detector and the shipper lever arranged to knock off the shipper lever when said detector is raised by movement of the broken warp thread.

7. A warp stop motion for looms having, in combination, a series of disks arranged so that the individual warp threads pass be tween surfaces of adjacent disks, said disks being arranged to permit the warp threads to be drawn therebetween' during the normal operation of the loom and having provision whereby the portion of the broken warp thread extended therebetween is gripped and moved with the disks, means for moving said disks, means actuated by the movement of said broken warp thread to cause loom stoppage including a pair of detectors extended transversely across and resting upon the warp thread adjacent said to be drawn therebetween during the nor- 7 mal operation of the loom and having provision whereby the portion of the broken warp thread extended therebetween is moved with the disks, means for moving the disks, and means actuated by movement of said broken warp thread to cause loom stoppage including a knock-off slide mounted on the loom frame, a lever pivoted upon the loom frame having one end thereof secured to the end of said slide and having the other end in engagement with the shipper lever, a lever pivoted upon said slide and normally maintained in a position with its front end raised, a hunter on the lay arranged to normally slide under the front end of said lever, and means actuated by a movement of the broken warp thread to cause the said lever to be tilted into a position to be engaged by the hunter on the lay during the next rearward beat thereof to cause movement of the slide to knock off the shipper lever.

9. A warp stop motion for looms having, in combination, a series of movable members arranged so that the individual warp threads pass between the surfaces of adjacent members, said members being arranged to permit the warp threads to be drawn therebetween during the normal operation of the loom and having provision whereby the portion of a broken warp thread extended therebetween is moved by the members, means actuated by such movement of said broken warp thread to cause loom stoppage.

10. A warp stop motion for looms having, in combination, a shaft journaled in the loom frame, a series of disks mounted upon and arranged to be moved by the shaft, a coil spring embracing said shaft and arranged to maintain pressure between the adjacent sur faces of the disks, said disks being arranged to permit the warp threads to be drawn through during the normal operation of the loom and the pressure between the adjacent surfaces thereof being such that "the portion of a broken warp thread extended thcrebetween is moved with the disks during the movements thereof, means for moving said shaft and disks, and means actuated by the movement of said broken warp thread to cause loom stoppage.

ISAAC SNOW. 

